Closure for containers



Sept. 3, 1935. D, J BLOCK 2,012,950

CLOSURE FOR CONTAINERS Filed Nov. 12, 1931 2 Sheets-Sheet 1 INVENTOR.

Sept. 3, 1935. D. J. BLOCK 2,012,950

CLOSURE FOR CONTAINERS Filed Nov. 12, 1931 2 Sheets-Sheet 2 INVENTOR.

Patented Sept. 3, 1935 a I I -UNITED STATES PATENT OFFICE CLOSURE FOR CONTAINERS p v a 7 i David Julian Bloch-Chicago, 111. j v Application November 12, 1931, Serial No. 574,535 I teams. (01-. 221-50) I C:

One object of the invention is toprovidc a selfthe outward pendingfiange or collar H which opening and self-sealing closure for containers is adapted to receive'the neck H of a collapsible of the, kind in which the contents are extruded container [3, the neck having the passage M; byameansjof pressure upon the bodyof the conwhich affords egress of ,thecontents'of the con- 5 tainer. f tainer. 7 H Another object is to provide a detachable The membersfi are bentup and'inward at acute closure whichcan, be secured to the container angles so that their terminaledge's [5 are brought selectively in an operable or non-operable posiinto resilient contact, in which position they form tion. i i a seal that can only be opened by exerting presv Referenceis to be had to the accompanying sure upon them from the inside outward. drawings in; which: r v I The members 8 arebentup at substantially Figure 1 represents an external View of a simht ang and 1311115 b o into frictional o ple embodiment of the invention. tact with the sides of the lip-members 5, the Figure 2 isa section throughthe device shown combined members 8 and 9 then forming the in Figure ,1. V chamber ls which communicates withthe in- Figure 3 shows the blankfi'rom which the terior of the container by m ans oi the pas-,- closure, shown in Figures 1 and 2 is formed. age 1 i I 1 Figure 4 shows a modified construction of the External pressure applied to the collapsible co n, closurehshown in Figure 2. H p 7 tainer forces the contents through the neck pas- 20 Figure 5 shows the blank from which the closage id into the chamber I6; these contents sub-, sure depicted in Figure/i is formed. g sequently impinge upon the inner surfaces of the r, Figure 6 pertains to a mode of manufacturing lip-members whereby these members are forced to the resilient sealing means. i a 1 yield upward and outward, thus forming an aper- Figure 7 illustrates another, means for obtainture through which the contents are extruded. 2 ing resilient sealing of the closure The extrusion continuesuntil the external pres- Figures, 8, 9 and 10 illustrate certain varia sure on the container is released. The lip memtions inthe constructional details; bers 8 then,- by, virtue of their inherent resiliency, Figure 11 illustrates how the closure can be resume their initial position in resilient contact made partially integral with the container. with one another, and thereby automatically ef Figure 12 isa modification of Figure 11., feet the sealing of the aperture. 1 30 The invention relates to closures of the kind It is evident that several modifications of the .in which the contents of the receptacle issue abovedescribed; device are possible. A simple through an; aperture formed by the yielding of modification is shown in Figured in which one of resilient lip-members. the members 3 is placed in a substantially ver- In the device of my invention opening and clos tical position, the opposed lip-member 9 being bent 5 ing is effected automatically, and the only maover at anacute angle, the terminal edges of both nipulation required is that of applying pressure lip-members being in resilient contact. In this to the collapsible container, the inherently resiliembodiment the vertically depicted member 9 does ent lips being conformed and arranged in such not necessarily have to actas a spring, since it 4O manner that they bear resiliently one against may be rigidly connected to the side-members 8. the other during their non-operative period and In this case, the vertical member 9 in conjunction can then be forced apart only by the impinging with the members 8 form three rigid sides of the of the contentsof the container upon their in chamber l6, and'the opening and closing of the ternal surfaces. seal is then effected by the resilient yielding of Figures 1 and 2 show a simple embodiment of the lip-member 9 alone, the terminal edge of the 45 my invention in which the'closure device is devertical member 9 then acting as'a sill for the lippicted as directly secured to the collapsible conmember. The blank for this arrangement is tainer. In this embodiment the entire closureshown in Figure 5 anddiffers from that inFigure device is shown as made of one single piece of 3 mainly by the modified lengths of the two lip- 5 resilient material, the blank beforebending and members and the conformation of the side-memforming being shaped substantially as shown in hers 8. Y I Figure 3. The blank has the central portion 1 It is obvious that the sealing efiect of the closure from which extend the side members 8 and the depends mainly on the firm resilient bearing of lip-members 9'. The blank may be provided with one lip-member against the other, in the case of the perforation H) to facilitate the forming of two lip-members being employed, or of the one 5.

lip-member against its sill if a construction similar to that of Figure 3 is resorted to.

The lip of member 9 is bent upward and inward at an acute angle, as shown in Figure 6; the opposed lip-member 9a is bent inward to a less extent so that the lip-member 9a overlaps the lipmember 9. The blank is then tempered and the lip-members are subsequently forcibly bent up until their terminal edges bear one against the other.

The resilient action of the spring-like lip-members will thus cause them to remain constantly in firm sealing contact until they are forced apart by a pressure from within, sufliciently great to overcome their resilience.

The constructions thus far considered apply to a closure device formed of a single piece ofrnaterial suchas metal, fiber, pyroxylin, or any other substance possessing the quality of resilience and i are sprung outward and forced into the position shown in full lines. Figure 9 shows a modification of this arrangement. The member Q being again separate whereas the member 9a forms an integral part of the plate from which the side members 8 and the base 1 are formed. -In Figure 10 both lip-members are formed of one piece of material and joined by the base la, which is superimposed and secured tothe central portion I which connects the side members-8. -Since it is desirable to have sealing contact between the side members 8 and the lateral edges of the lip-members, these side members may be made separate, and secured toa common base I in such a manner that they lean slightly inward'and resiliently bear against the lip-members. The same effect can be obtained,however, by blanking the base and the side members integral and subsequently bending the side members up and slightly inward.

Figure 11 shows a closure device which is'partly integral with the container -itself.' The top 'of the container l3 has been cut to provide'the side members 2| bent up at substantially right angles, the lip-members 9 being made separately andsesingle piece of metal.

cured in any suitable manner to the top of the container, the relative action of the side members and lip-members being the same as hereinbefore described. Thematerialfromwhich the top of the 'sill and side members being secured to the top of the container in any suitable manner.

Having thus described my invention, I claim:

1. A closure device formed from a single piece of metal adapted to automatically open for the egress of the contents of a collapsible container when under pressure and automatically close'the said container against further egress when pressure. on the container is released, said closure comprising spaced apart substantially parallel enclosing walls and a pair of pliant opposed walls included in the area between the retaining walls, the terminals of the pliant walls adapted to be in resilient. closing contact when the pressure upon the container is released.

2. A closure for pressure-operated containers having a-flexible wall of resilient material, normally closed byits own resiliency and having free edge and top portions, and side walls cooperating with the flexible wall to form a compartment, said flexible wall and side walls being formed frorn'a 3. A closure as set forth in claim 2, in which the closure has 'a pair of flexible walls of resilient material, normallyclosed against each other by their own resiliency. I

4. A closure as described in claim 2,in which the edges of the-flexible wall are in frictional eneasement-with the sidewalls. v

5. An integral sheet metal closure of flexible resilient material comprisinga base adapted'for attachment to a "pressure-operated container, walls turned upwardly from the base, one of said walls having free edge and topportionsand being normally held in closed position against'another of said walls by its own resiliency, and a pair =-of walls forming a closed compartment with said first two walls.

- DAVID JULIAN BLOCK. 

